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This set of two circuits from the basis for a very simple light wave transmitter. A LASER beam is modulated and then aimed at a receiver that demodulates the signal and then presents the information (voice, data, etc..). The whole thing is very easy to build and requires no specialized parts execpt for the LASER itself. LASERs are available from MWK Industries. |
Schematic Of Transmitter |
Schematic Of Receiver |
Parts |
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Notes |
Related Circuits |
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| HELLO Mr Shahid Manzoor , I am also working on the same PROJECT as my Final Year Project , (student of electronics engineering at PAF-KIET) I have some queries and i reuqest you to guide me about my queries/ confusions related to this project .. so can you please contact me on my personal email or give me your personal email address so i can contact you easily .. Please do reply me.. A.S.A.P. THANK YOU REGARDS, ADEEBA RAFIQ | ||
| This is to inform all of you that I already tried this project and i am successful. I have submitted it as my final year University project in which I succered 100% marks. Only few amendment I have made to the both Transmitter & the Receiver circuits. In Transmitter I used 1-Ordinary Laser Pointer instead of Laser Tube and 2-Audio Transformer of 8:1000 Ohms instead of 8:2000 Ohms. And at Receiver Circuit 1-Ordinary LDR instead of NPN Photo transistor. And apply totally two different power sources to the Circuits of TX & RX. If Any Body Needs Help Then Leave A Message For Me In This Regard. | ||
| can u suggest which class laser do i need to use and which is reasonable in cost | ||
| in my receiver part i have got a problem of voltage drop at U2 sorry may you help me to find the solution | ||
| i am trying to demonstrate this transmission as my 1st semester project. i build-up the transmitter using 555-timer circuit and receiver as u mentioned but its quite not working. I had used l14f1 qt840 photo-transistor; is it appropriate to use it? what you suggest me to do? i try to get the audio transformer of 8-2000 ohms but i couldn't get it on market which one can replace it? | ||
| is there a class of laser that is needed? like a minimum of a class BII? | ||
| Hi how can i add a small mic to the transmitter circuit? Thank You | ||
| i am using the same concept to modulate a red laser at 2.5khz and recieve it 100m with a light sensor to count a hit or a miss.The problem is that it works fine in the dark but with sunlight it doesnt..any idea as to WHY???(is my laser getting saturated(decreased intensity) or is it the noise due to the sunlight?) any ideas on how to solve this problem?? can i get an off-the-shelf laser TX/Rx module that is immune to daylight with 100m range?? | ||
| i need help for my project. i have two analog signals to send (i must use 2 transmitter device and 1 receiver device : according to the project) so i dont know how can i spread at the end of receiver. | ||
| hello sir, could you send the brief explanation on this project,because i was prepare one power point presentation on this topic. | ||
| the circuit its work but if you need some more special aplication so need a more sophisticated circuit . this is a very basic circuit to show how it works the theory . don be ox | ||
| hi i need a help because i have struck in the middle of the project. i have a problem in transmitter circuit & problem is with the circuit before laser part nd i got this circuit from efymag so please help me | ||
| Why not simply wire the audio signal through the batteries of a pen-laser, and pick them up on a small solar panel soldered to RCA jacks? Does the same job for $10...I built one years ago after reflecting a laser off a window, receiving it on a solar panel, and realizing that the sound I picked up was just the modified wavelength of the beam...It was the sound of my family talking inside! | ||
| FIRST:IF YUO WANT TO TRANSTIMT VOICE OR A SIGNAL YUO NEED TO MODULATE..DE LASER BEAM ITS ONLY A CAREER..SEAR FOR AM OR FM ..ITS THE SEAME BUT WITH LIGTH SECOND :I THINK THAT YUO CAN DO THIS WHIT A CHEAP LASER POINTER, MODULATED WITH A 555 ..AND STUFF LIKE THAT 3:FOR ALL OF YUO THAT DONT UNDESTAND ..THAT I REALLY RECOMEND TO LEAR ELECTRONICS..AND REALLY THE FORREST MIMS iii COLECTION BOOKS (ALL STUFF FROM RADIOSHACK)ARE REALLY COOL..A LOT OF IMPRESIVE CIRCUIT AND VERY SIMPLE...WELL LIKE OTHERS OF CORSE 4:I AGREE THAT PLAY WITH LASER TUBE , HIGH POWER LASER ..ITS A LITTLE RISKI..JAAA..SO..LEANR FIRST AND PLAY BEFORE.. BE THE WAY...TRANSMIT DATA WITH LASER HAVE SOME PROBLEMS:THEY NEED TO BE COLIMATED ..YUO KNOW LIKE A LINE AND A TARGET ... SORRY BUT I DONT SEE ANY MODEM IN THE MATERIALL LIST...:U1,U2 ARE VERY COMONE CHIPS AND CHEP TOO, AND AUDIO TRANSFORMER ITS NOT A MODEM.. THE CIRCUIT ITS NICE ..BUT I DONT KNOW THAT ITS REALY WORKS...REALY I DONT KNOW NOTHING!!BYE HUMANS... | ||
| I noticed that the single power supply method is used for U1. Should not pin 3 be connected to a half-rail voltage divider circuit? Does this work as it is? F.M. | ||
| what are the advantages of using lasertorch in voice transmitter & receiver | ||
| I don't know about LASER Tube | ||
| my brother once showed me tht he cud cut paper using a normal LASER we get in t market, as a pointer.. has ne1 else heard of this or wud u kno how to create it... | ||
| has anyone used this laser/receiver/detector in light language say to be connected to a laptop.? Does the audio have light pulse carrier send/receive capability? Would our # pulses of light translate into sound? If the laser is detected is there anyway to send the correct response intelligently. MRUW | ||
| show me the pcb of laser transmitter? | ||
| what is th 2 modem chips??????????? | ||
| Can someone please tell me how do a laser torch - based voice transmitter and receiver works ? | ||
| What is it with all these students that don't know shit about electronics. If you can't figure out how to transmit data with this schematic so nicely laid out for you then maybe you shouldn't be playing with lasers. | ||
| thank you for simple diagram...i want to use this to trnsmit data to my com.........how it work? and what are 2 modem chips thnks again | ||
| Replace the laser they show with a laser pointer.
Oh, and if you simply hook it up to a headphone jack you eliminate the need for a speaker as well,as a pair of headphones will act the same.
As shown, this mother is costing about $400-$500
scitoys.com has a better explaination (Editor's notes: $400-$500?) |
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| how close are to today's light transmitters and receivers to those conceived by Feynman almost 50 years ago??? | ||
| i am very happy in this moment.because i want to make a laser project.this circuit is suitable for these project.thank you | ||
| this might be the thing that i need. Unless it is an amplitude modulation circuit. pls send and email to me if you have any idea on how to construct a laser FM audio circuit. thanks. btw, i am a Computer systems Engineering student in De La Salle University Manila. | ||
| respeted sir, you didn't give any detailed about laser beam on your text and how it will work? | ||
| please, would u suggest what are the applications and advantages of this? | ||
| hai sir i am pkumar, please would you give brief description about this circuit.Has like to do seminar on this project. | ||
| u said that the circuit can be made to transmit computer data using modem chips.. how exactly do we do that? i am doing a project on a related topic so it would be helpful if i could get some detail on this aspect. | ||
| I'm currently doing a high speed video camera. I need a photodetector to detect the laser pointer light and have a TTL output. May i know this circuit is suitable for this application or anyone here can tell me how to make it because i'm a mechanical student. Your kindly reply will be appreciated. | ||
| Please can you help me with a transceiver for outoor broadcasting and will prefere the frequency in the UHF band thank you. | ||
| To all the laser tube that is on the schematic seems to be a HeNe laser tube. Dangerous if you don't use caution. You would not want to use this type of laser and receiver due to the exposer of the laser you only need one mili watt of power to burn your eye balls. This type of laser typicaly operates at a 675 nm wave and putts out an average output power of 4.5 mW. These types of lasers are way too expensive to play with on the weekend avg cost is about 800 bucks. Best thing to use is a laser pointer to activate the receiver you build. Good luck | ||
| can this technology be applicable in a "counter" principle? eg . count of the number of people who enter an establishment? | ||
| bad circuit | ||
| i need to know sources which can provide me with important and relevant informations regarding transmitter/receiver for a anti theft detector. | ||
| what is the laser tube...how much is it and where do i get it i tryed the website above but it doesn't work | ||
| i select it as my minor project | ||
| can ne one tell me abt laser tube usd in laser transmiter and reciever...its pics wud b of great help ...i cant find it in market so need help..........plz help meeeeeee........wat kind f supply does it require... | ||
| I NEED A SIMPLE TRANSCEIVER CIRCUIT WHICH I CAN BUILD TO HELP THE BLIND IN MOVING AROUND | ||
| Im a final year student who currently conducting a final year project regarding laser bounce window....a system where transmits laser and bounces back when it hits a reflecting material. Any vibration the laser detact could be sensed in the receiver and it will be converted to its corresponding sound. My question is....how is it possible that a laser could carry this type of sound vibration. Which theory does explain it well? What s the characteristic of the laser which able it to bahave in such away. | ||
| could this circuit be used in long jump when the athete steps over the line | ||
| i think you could use pen lasers with this... just set voltages that wont burn it out... | ||
| hai am stud , if u can please send some details about laser torch based voice transmitter and receiver | ||
| plz tell me about laser tube specification and pcb layoot | ||
| I'm an MTech student of OAU Ile-Ife in Osun state, Nigeria. I need a circuit diagram of a tranceiver that can detect illegal electricity consumption at a remote distance say 500 meters away. It should consist of various componenets such as a coder and a decoder in order to trip-off the exact meter if such is detected (Editor's notes: Do your own homework.) |
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| sir, can u please tell us the true specafacations for the Laser tube like co2 or type or what wattage..??? & where we can get & how much approxmatly cost....???.... | ||
| HI i am a student and for my senior project i would like to build a laser bugler alarm could some one help show me how to do it. | ||
| hi i am student 4th year sudent i have a project aboat laser transmitter/reciever. can you send me some project obout this? | ||
| i want to know about laser transmitt/reciever | ||
| Sir, Your reciever circuit is very clear cut arrangement but in transmitter circuit it is a problem.It is not confirmed that from which point modulated laser beam is coming out of the system for propagation in environment.Secondly,is the transmitter is capable to work at 220V ? or at lab supply ? thirdly it will be good if modulating circuit inside the laser tube is also explained.I need your proper guidence and doubt clearence in this project as soon as possible. | ||
| If possible then plz mail me pcb layout of these circuits.Further I want to know that according to your arrangement only one person can transmit the data,is it possible to transmit the different signal from 4 persons through one beam and recieved by 4 person at other end ? If it is true then send me the details about circuits and theory about it including multiplexing,a-d convertor,d-a convertor or whatever,as soon as possilble. (Editor's notes: If PC board patterns are not shown in the page, then they are not available.) |
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| hi I'm a degree student in final year..I'm doing the project building security system using laser...what sensor can i use to detect the laser beam? can i use Light On relay or Dark on relay or u have better suggestion.. | ||
| hello sir ! i m a 4th year student . i have a project in this year. i want to make a project on the laser communation. can you send some project regarding this? | ||
| Sir I am student ob B.Tech final year of E.C.branchproject and want to make a low cost and high quality project on Laser transmitter and recievers,up to 5000/-.So properly guide me | ||
| the working circuit i found and made it... its truely amazing upto 500 meters it can work seearch on google "www.electronics foru.com laser torch transmitter" | ||
| The Supply voltage of the Transmitter has not been shown. Shall it be 220 V ? I think C3 should be connected to the left out PINs of the flourescent Lamp . Please send Mail. | ||
| hello sir ! i m a 3rd year student . i have a project in this year. i want to make a project on the laser communation. can you send some project regarding this? your loving tudent | ||
| can you give me the most simplese circuit for constructing this alarm using laser | ||
| sir it was really very nice and i decided to use this as my mini project....so please send the more details and other applications.... | ||
| Dear Sir I am Electronic 1st year student. I would like to make the project on Pulse Frequency Modulated Infrared Communicator. So pls send me the enough detail about transmitter and reciever. Thank you ....i m waiting. | ||
| Hi, I am a final year student preparing for a final year project which is to be summitted to my supervisor as soon as possible. i came across this project (LASER Transmitter/Receiver) and i will really love to do the project. so, i will be grateful if u can give me an update on how to go about it. thanks, shollexy. | ||
| hello sir, i am ec 3rd year student.we have a project in this semester.so i would like to make the project on laser communication.so pls send me the enough detail about transmitter and reciever with ckt specification......................................thank you ....i m waiting | ||
| i actually not try to build the circuit but the theory is will defined.i guess it will work. | ||
| sir i am a third year engineerin student.. i would like to prepare a model of a laser transmitter an receiver... i am an amatuer in this field.. plz do specify how does one go abt the design an the assembly an workin... | ||
| i'm in a final year project, but i still couldn't find the transmitter circuit for me to interface it with PIC. My project is called 'robotic communication control system'. Sir, please mail me the best transmitter circuitry. | ||
| sir, i have to present a seminar on audio link using laser transmitter and reciver ,sir please can you mail me the complete working of this circuit. i | ||
| i am not able to see the cicuit working | ||
| i want the exact theory about this article also i want the exact working of this circuit & particularly where it is used with ex. | ||
| Dear Sir, hw do i include a measuring circuit in the transmitter and reciever circuit. I have a project on laser which will be able to measure distance...could you kindly please tell me more.. I'm desperately in need and assistance. Thank you very much | ||
| although it is simple ,it doesn't mean it doesn't work. me my self love THIS kind of circuit. | ||
| i want the exact working of this circuit | ||
| i want the exact theory about this article.you didn't particularly mention high voltage thank you | ||
| hi.....plz tell me the working of laser transmitter and receiver!!!! | ||
| give some infomation about its working......... | ||
| Dear sir. now I need some information(circuit and Principle) about the laser transmiter and laser redeiver . Regards | ||
| Dear sir, Plz send me a circuit of transmeter and reciver the one they use in remote cars. Thanks for the co-operation. Regards, Vishwas | ||
| Hi ... I need the advice of you experts in clarifying my doubt with regard to the instruments that can detect laser pulses. I understand that not all forms of laser are visible. If a laser source directs a laser beam on to a target and if the laser beam is not visible, then how do we make sure that the laser beam hits the target ? Is there an instrument that we can use around the target to see if there is any laser beam directed towards it ? I need this information as a priliminary information for my project. If you know the instrument that can detect laser pulses, please let me know. Any help and advice in this regard is highly appreciated. Regards | ||
| Can we just use a LED instead of a laser? | ||
| Bonjour!Can i have precisions about the phototransistor which may be used for transmitting audio.?Specially on which side is to connect emitor and collector?Thank you. | ||
| can anyone tell me about Laser Transceiver IC which is easily available in Delhi? | ||
| Hi ... I need the advice of you experts in clarifying my doubt with regard to the instruments that can detect laser pulses. I understand that not all forms of laser are visible. If a laser source directs a laser beam on to a target and if the laser beam is not visible, then how do we make sure that the laser beam hits the target ? Is there an instrument that we can use around the target to see if there is any laser beam directed towards it ? I need this information as a priliminary information for my project. If you know the instrument that can detect laser pulses, please let me know. Any help and advice in this regard is highly appreciated. Regards, sv | ||
| hi i need hi power laser can effect in metal | ||
| hey i need a laser to heat things up with. how do i do this? | ||
| Hi I want to design laser receiver circuit by a diod or optic. I am studying farm machinery in Tehran university in Iran . today laser instrument uses in farm equipment such as laser land leveler,land scraper. if you want to help me ,please mail to my address. Bye. | ||
| I am doing project using ICLF356 & ICLM567 Q2N2222 | ||
| lTM8848 informations | ||
| nice | ||
| i think that all founded circuits are very good and helpful for all people but it need to explain more than that we need to show how circuits works and why we choose this components which introduce this circuit and all circuits | ||
| average project | ||
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